52 Britton: Studies of West Indian plants — XI 



the raphides linear, undulate, transverse, prominent upon the 

 upper surface. 



Hanging from wet dark banks, Heights of Aripo, Trinidad 

 (Trinidad Herbarium 10,008, Broadway). 



Inga ierensis Britton, sp. nov. 



A tree up to 16 m. high, the petioles, leaf -surfaces and ped- 

 uncles strigillose. Petioles slender, 2-3 cm. long; rachis-glands 

 suborbicular, semiglobose; leaflets in 2 pairs, ovate-elliptic, char- 

 taceous, shining, 7-10 cm. long, pinnately veined, the apex 

 rather abruptly short-acuminate, the oblique base narrowed 

 or obtuse, the strigulose petiolules 2-3 mm. long; peduncles 

 about 6 cm. long or less; legume broadly linear, compressed, 

 glabrous, shining, up to 10 cm. long, about 2 cm. wide, finely 

 striate, abruptly short-tipped, the margins continuous or deeply 

 constricted. 



Forests, northern mountain range, Trinidad. Type from the 

 Maracas Valley {Britton and Hazen 1627). In fruit April io, 

 1920. 



Serjania ierensis Britton, sp. nov. 



A vine up to 7 m. long, the branches slender, glabrous. Leaves 

 about 6 cm. long, biternate, the short, slender petioles 1.5 cm. 

 long or less, sparingly pubescent; leaflets coriaceous, glabrous, 

 4 cm. long or less, serrate, finely reticulate-veined, shining, 

 those of the terminal segment acute or acuminate, those of the 

 lateral segments rounded or obtuse; peduncles about as ong as 

 the leaves, glabrous; tendrils very slender, 2-4 cm. long; panicles 

 puberulent nearly as long as the peduncles; samaras glabrous, 

 about 15 mm. long, the wing finely reticulate-veined, about 4 

 times as long as the body and only partially enclosing it. 



Dry thickets, Trinidad. Type from Palo Seco (Britton and 

 Hazen 1172). In fruit March 30, 1920. 



Clusia intertexta Britton, sp. nov. 



Forming impenetrable masses with interlocking aerial roots. 

 Leaves orbicular-obovate, 10-14 cm - l° n g> thick-coriaceous, 

 rounded, the base subcuneate, the lateral veins many, about 4 

 mm. apart, prominent on the upper surface, the very stout 

 petioles 1 cm. long or less; inflorescence several-flowered, its 

 branches stout; bracts 2-3 cm. long; buds globose, glabrous; 

 fruit (immature) oblong-ovoid, beaked, about 2.5 cm. long; 

 stigmas 6. 



Forest, Heights of Aripo, Trinidad (Trinidad Herbarium 9786, 

 Broadway), January 10-26, 1922. 



